Controlling apparatus for hydraulic variable-speed gears.



R. JANNEY.

GONTRLLIRG;APPARATUS"FOR HYDBAULIUVBIABLE SPEED GEARS.

APPLIOTION FILED MAR. 17, 1914 1,103,443, 'Patented Aug-Q mffsmave i; 29"15 wtnesses: www @if y. I v .Mymw W UNrrED s'rn'rns Irn'rnirr ornron BIE.YNOLD JANNEY. OF NEW YORK, N. Y.,

ASSIGNOR TO THE VJATRBUB-Y TOOL COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

v CONTROLLING APPARATUS FOR HYDRAULIC VARIABLE-SPEED GEARS.

Specification-of Letters Patent. I Patented Aug: 25, 1914 Application filed March 17V', 1914. Serial No. 825,252.

uimraitiis for hydraulic-variable-speed gears1 the object of the invention beingr to provide shnple. and eliective means which is positive and certain in action and by which the transinissirni oi? power can he effectively lgoverned to either stop or start a-driven member or to eifect variations in speed of Isaid driven ineniber ot whatever character the saine may be.

ln the. drawings accompanying and forminfl part oit the. present specification I have Ishown in detail one of the convenient orins of embodiment of the invention Which to enable those skilled in the art to practise the saine will be set forth fully in the followine` description. I do not restrict myself to this showing; I inay depart thereforni in se\eral respects within the scope of the invention deiined by the claims tollowingsaid description.

ing to said drawings: Figure l is a sectional side elevation ot' controllingy apparatus embodying,y niy invention and showing the. saine operatively connected with a liydraulic-variablespeed gear ot' known oonstruction. Fig. 2 is a horizontal sectional detail, the. section heini: taken through the lower end of the control shaft and illustrating' particularly the connection between saidI control shaft and the regulator.

l'rike (.:haracters refer to like parts iinures of the drawings. l

As will hereinafter appear niy controllingaplniratus operates usually-in conjunction with a regulator which .is shifted to obtain dill'erent relations in a speed gear. This .regulator niay Vary de eidedly as to type. It may shown, although this is always not necessary, consist ot what is known in a hydraalie-variable speed near as a tilting-box.

A hydraulic-variable-speed-gear usually eonrprises a pump section or end and a hydrauhe-engine section or end. and. it has been the practice to relate these two sections in boar hydraulic variable o r ends in a Lgreat many diiierent ways, which are unnecessary' for .ine to describe as my invention is not founded thereon. In Figi. 1 of the drawings, however, l have illustrated one hydraulicwariable-speed gear oi known construction which is practically similar to that shown in Letters Patent No.

92h78? granted to nie June i5, 1909, and towhich reference inay be had. In said view the numeral l denotes the pump end or section, while the numeral 3 is applied to the hydraulic engine or niotor section there* of. lVithin thecasine ot the pump end 2 is inounted the tilting-box l which as already observed, presents a suitable regir lator. This tiltingrbox it is shown as occupying' its neutral position in Fig. l. When said tiltingl box is nioved in one direction from its neutral position a shaft as 5 constituting),`

a suitable driven nieinber, will be rotated in one direction, the 'speed ot. said shaft being increased progres-shelf as the tilting box :novest'roni said'neutral position. lVhen the tiltingr lbox oppositely n'ioved the saine increase of speed follows, but the shaft is driven oppositely. Supported by the pump or `Iii-end 2 is the shaft 6 which is usually cmitinuoi'islydriven, for instance by an electric-motor. n

To shift the tilting-box 4l I have shown the control-shaft T which has a suitable o perative connection with said tiltingbox. That sl'iown and now to be described meets the desired. conditions. The lower end of said rotary control shaft 7 extends freely throueh the block 8 mounted between the hrancnes of the outwardly extending I'orlr f) oi' said tilting-box, said block having laterally extending trunnions l0 which arernounti ed to relatively turn in slides 11 supported for back and forth movement in .the longi* tudinal slots or ways l2 of the branches or forli 9. rlhe lower end of the control shait may as shown be provided with a nut 13 between which and the block or sleeve tl is interposed the washer 1l. The shaft 7 where it extends through the block or sleeve 8 reduced so as to present a shoulder 1.5 to engage the upper surface of the block or sleeve. said slimilder-and nut presenting' jointly a convenient. nieans for preventing longitudinal movement of the shaft 7 with respect to the block or sleeve. wWhen the :fhatt Y, therefore. endwise moved, for example upwardly as shown, the tilting box los lis moved in one direction from its neutral position, aud when said shaft oppositely moves, said tilting box is moved in an opposite direction from said neutral position. The means whereby this longitudinal movement of the shaft is accomplished will be hereinafter set forth.

It is desirable that lateral movement of the said control shaft should be prevented, and various means may he provided for securing this function, altlmugh those shown and now to be described answer satisfactorily. Pivotally connected with the outer extended ends of the trunnions l() are blocks 16 which in the present ease are adapted to slide vertically in ways consisting for example of grooves 17 in the easing of the A-end 2, said casing constituting a part of the framework.v It will be clear that the blocks 1G as shown move strictly in a vertical direction or in the direction of the axis of rotation of the rotary control shaft 7, sov

that they etfectually prevent lateral movement of said shaft without interfering with the longitiulinal movement thereof.

Any suitable means may be provided for rotating the control shaft. For this purpose said shaft is shown having keyed thereto the band Wheel 18 by which said shaft can be directly rotated and about which may be passed one or more times, the cable 19. It, therefore, follows that when the wheel' 1S is rotated the shaft 7 will be correspondingly operated. Said shaft projects into the casing of the A-end through a stulling boX as 20. The control shaft 7 is shown provided at its upper end with a screw or threaded. portion E21 which extends through and has a threaded connection with a suitable powertransmitting element which as shown consists of the bevel gear 2Q mounted in the boxing E23 and held against movement in the direction of the axis of rotation ofsaid shaft 7, by said boxing supported by brackets or uprights 9.4: and Q5 rising from the casing of the A-end 2. .In mesh with the bevel gear 22' and also inclosed by the boxing Q3 is the bevel-gear 2G at the inner end of the shaft 27 supported by the bracket said shaft 27 being operatively connected in some desirable manner as by the train of gears 2S with the driven shaft 5 which driven shaft as will be understood is caused to rotate when the tilting box 5 is moved in either direction from its neutral position. It will be assumed that the shaft 7 is rotated by the hand wheel 18. shaft it is moved longitudinally by the bevel gear Q2 acting as a feed nut, to shift the tilting box et from its neutral position. When said tilting box is thus operated the shaft 5 is caused to rotate and through the described gearing, to rotate the shaft 27, so that through the train of gears 28 and shaft 27, the bevel gear 2G will be rotated, where- On the rotation of said i.

by the latter will rotate the gear and thereby tend to move the shaft 7 in an endwise direct-ion opposite to that in which the shaft 7 is'initially endwise moved, so that the engine or B-end 3 through instrumentalities such as described, tends when in aetion to longitudinally move the shaft 7 in a direction opposite to that in which said shaft is longitudinally moved by its con` trolling member of whatever form theI same may be, by reason of which variations in speed of the shaft 5 in either direction can be obtained.

Suitable means is provided for taking up wear between the bevel gear or feed nut 22, and the feed screw 2l, and like the other features of the invention, said means may vary in certain particu ars` although that shown and now to be described is satisfao tory. Fitted to the threaded or screw portion 2l is a nut 80, the threads of the interior threaded portion of said nut corresponding with those of the threaded portion 21, so that by turning said nut, the shaft 7 can be moved endwise to bring the threaded portion 2l solidly against the interior threads of the bevel gear 2Q and eliminate any backlash that may be present. As shown the nut 30 has external threads to engage corresponding threads in the socket 3l of the bevel gear-22 in Which said nut 30 fits, so that by turning the nut in the proper direction, it can be fed inward or outward to effect corresponding movements of the threaded portion 2l. The external threads 31 are 'of very vfine pitch and any motion therefore, that is given by said nut 30 to the threaded portion 21 will be comparatively slight, being just sullicient to compensate for any wear that may occur between said threaded. portion 21 and the threaded portion of the bevel gear 22. The motion therefore, is very small indeed and is not enough to move the tilting box 4 .from its neutral position an extent sufficient to start the shaft 5. Any desirable means may be provided for holding the nutBO in its adjusted position, the screws 32 being shown for this purpose and being tapped through the nut and their tips being adapted to engage the upper surface of the bevel gear 22. The nut 30 and the upper threaded end of the shaft 7 can be received by the cap-piece 33 having as shown a threaded connection with the easing or boxing 23.

lllhat I claim is:

l. The combination of a hydraulic variable speed tary control shaft connected with said regulator, a power transferring member having a threaded connection with said shaft, the latter when rotated being longitudinally movable in one direction by said threaded connection to thereby shift the regulator, and means operable by the hydraulic vari,--

gear involving a regulator, 4a ronioefiae able speed gear, for turning said power transferring member to more said shaft endwise in the opposite direction.

2. '.lfhe combination ot a hydraulic. 'variable speed gear involvinga regulator, a rotarv control aha'tl connected with said regie lator, a power transferring member having a threaded oonnei'ftion with Said shaft, the lat ter when rotated being longitudinally movablein one direction by said threaded oonneetion to thereby shift the regulator, means; operable by the hydraulic variable speed gear, lfor turning; :said power tai'isferring member to move said shaft endwise in the opposite direction.l and means for eompen satiiml tor wear between said shaft and said power transferring; member.

i5. The combination of a hydraulic variable speed gear involvingij regulator, a rotary :fhatt connected with said regulator and having a threaded portion thereon, a rotarv member constituting;` a nut iuteriorly threaded to receive the threaded portion of said shaft, whereby when the shaft is rotated it will be moved in one direction bv said rotary member to therebyY shi'lt the regulator,means operable by the hjuiraulie variable Speed gear, for auton'iatirally turning said rota-r1,T member to therein7 cause the movement of said .ahatt endwise in the opposite direction, means for preventing movement et said ro tariy member in the direction of its oi? nu,ve1uent, and meai'rzl for relatively operating' said shaft and rotary member to talle up wear between the threaded portions of the shaft and the rotary member.

4. The combination of a hydraulic variable speed gear involving a regulator, a rotary shaft eonneeted with said regulator and having a threaded portion thereon, a rotary member constituting a nut interiorly thread ed to receive the threaded portion of Said ari i it lll Shaft. wliereby when the .aha'lit is rotated it will be moved in onel dueetion b v said rotary member to ther-obi` ebi'tt the refrrulator, means oiarable bv the hvdraulie variable speed `near, lor autonnitieally turning; :Said rotaryv member to thereby raufso the movement olf said shalt endwise in the ooooeite direction, means 'tor preventing;l movenient oit said ro tary member in the direction oil its axis oit movement, and a not having a threaded con neetion with lthe threaded' ijioi'tion of said ehalit and also hz'iring a threadeifl connection with aaid rotary member. 4

5. 'lllhe oi iiilrimiti in oit a h vdraulie variable speed gear involving a regulator, a. rotariY shaft connected with said regulator and having' a threat'led portion thereon, a rotaryv member constitoting;- a nut interim-ly thro-atb ed to reeeive the threaded portion or' .fs-aid shaft, wherebyY when the Shaft i5 rotated it will be moved in one direction by said ro tary member to therebv Shift the regulator, means operable by the hydraulicl variable `apeed vgear, ior autianatieallv turning slain rotarj,7 member lo thereb'Y rauwe the movi`- ment of said shalt endwise in the opposite direction, means tor proventinan movement of said rotar)T member :in the direction oi; ite axis of n'iovemeut, a nut harina; a threaded Connection with the threaded portion o-'l said shaft and aleo ha ving' a threaded eonneetion' with said rotary inc-anbei', and fla-rewa tapped tl'irough the nut and engaging, aaid rotary member for adjua'tiog said nut and Alor hohling,` the same in an adjusted relation.

ln testimony whereof l :rl'lix my ainjnature in presence of tivo witnesses.

ll-EYlilliD .lil lli il lil Y.

Witnesses:

Bono'rnr (l. Brianna, Mani' Si. liromme'ran. 

